Sexual reproduction of corals is one of the most important processes for the persistence of coral populations. The Coral Triangle is recognised as a global hotspot of marine biodiversity, harbouring 75% of the world coral species. However, coral reproductive studies remain underrepresented in many reefs in the Coral Triangle. This study reports the coral spawning and spawn slicks occurrences from 2012 to 2019 at Lankayan Island, Malaysia, a small island located in the Sulu Sea at the westernmost boundary of the Coral Triangle. A total of 14 species belonging to three genera and two families were recorded to spawn on the reefs between March and May in 2012–2015 and 2019. Between one and eight species spawned on each observed spawning night. Acropora corals appear to dominate the spawning events based on direct observations on the reefs. Coral-spawn slicks were observed during March to May every year and in October 2019. We observed coral spawning between March and May in Lankayan Island, similar to other localities within the Coral Triangle.

珊瑚的有性繁殖是维持珊瑚种群的最重要过程之一。珊瑚三角是公认的海洋生物多样性的全球热点，拥有世界75％的珊瑚物种。但是，珊瑚繁殖研究在珊瑚三角地区的许多珊瑚礁中仍然没有得到很好的体现。这项研究报告了2012年至2019年在马来西亚兰卡扬岛（Lanyanyan Island）发生的珊瑚产卵和浮油现象，该岛位于珊瑚三角最西端的苏鲁海中的一个小岛。在2012–2015年至2019年的3月至5月之间，共有3个属和2个科的14种物种被记录在珊瑚礁上产卵。每个观察到的产卵夜都有1-8种物种产卵。棘足类根据对珊瑚礁的直接观察，珊瑚似乎在产卵事件中占主导地位。每年3月至5月以及2019年10月观察到珊瑚产卵现象。我们观察到3月至5月间在兰卡扬岛的珊瑚产卵情况，与珊瑚三角地区的其他地区类似。